Lumens Factory SR-6 (120 lumens)

[Cosmo7809]

I received my package from lighthound today with various goodies containing the above lamp assembly. I planned on putting this into my G2 but when I put the lamp in it seems ALOT less bright then the normal 65. Whats the deal? Are there bad assemblies?

 

[cernobila]

I received my package from lighthound today with various goodies containing the above lamp assembly. I planned on putting this into my G2 but when I put the lamp in it seems ALOT less bright then the normal 65. Whats the deal? Are there bad assemblies?

Firstly make sure that all is consistent and correct with your light, try and compare the two lamps only looking at the centre of the beam say across the room....which has a brighter centre?....The overall light output is very similar on these two lamps...SF has 100 bulb lumens against the SR-6 120 bulb lumens....20 lumen difference is hard to pick with the eye. Some lamps look brighter because they illuminate a greater area, while others concentrate most of their light into a tight spot......anyway, see how you go.

 

[Cosmo7809]

SF has 100 bulb lumens against the SR-6 120 bulb lumens....20 lumen difference is hard to pick with the eye.

I have the stock 65 lamp....

Once it gets dark out I will take some beamshots and see how it goes.... Worst comes to worse I will just return it and get a different one.

 

[beavo451]

I have the stock 65 lamp....

Once it gets dark out I will take some beamshots and see how it goes.... Worst comes to worse I will just return it and get a different one.

The P60 is rated at 65 out the front and is a conservative advertised figure. It has around 100 bulb lumens. The LF is rated at 120 bulb lumens and is probably around 80 lumens out the front.

 

[mdocod]

both the P60 and SR-6 are ~5.5W bulbs, there is no significant difference in power consumption between the 2, - they should have remarkably similar behavior. Any difference between the 2 that is noticeable would be color temperature or beam profile. That is, assuming your SR-6 is not malfunctioning in some way.

A Surefire lumen is a torch lumen measured on partially depleted cells from what I understand. It's almost like an "averaged" output to be expected during the runtime, pretty much all surefire incandescent lights start off brighter on fresh cells than their lumen rating.

LumensFactory tells you at what voltage a particular bulb lumen and other behaviors can be expected. So the SR-6 is 120 bulb lumen at 4.8V, 1.1A. If you take the same bulb and de-rate it for partially discharge cells, and then losses from lens and reflector, it's around around the 65 lumen that surefire rates their P60 at.

Eric

 

[Cosmo7809]

Thanks guys!